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Effects of Guinea Grass ( Panicum Maximum ) and Jackfruit Leaves ( Artocarpus Heterophyllus ) Silage Mixtures on Growth Performance, Linear Body Measurements, Carcass Characteristics, and Organ Weights of West African Dwarf Goats

Woke. J. A, ., Ukanwoko, A. I, and George, O. S, .

Abstract

Seasonal forage scarcity and low nutritional quality of tropical grasses constrain small ruminant productivity in humid tropical regions. This study evaluated the effects of ensiled mixtures of Guinea grass (GG, Panicum maximum) and jackfruit leaves (JFL, Artocarpus heterophyllus) on growth performance, linear body measurements, carcass characteristics, and organ weights of West African Dwarf goats. Five silage treatments were formulated: T1 (100% GG), T2 (75% GG + 25% JFL), T3 (50% GG + 50% JFL), T4 (25% GG + 75% JFL), and T5 (100% JFL). Fifteen growing WAD bucks (initial weight 5.64 ± 0.28 kg) were allotted to the treatments in a completely randomized design (n=3 per treatment) for 84 days. Growth performance was superior in T4, with the highest final body weight (8.03 kg), total weight gain (2.28 kg), average daily gain (27.18 g/day), and best feed conversion ratio (9.43) (P < 0.05). Linear body measurements revealed modest dietary effects: final body length and heart girth were highest in T4, while withers height was greatest in T1. Head length was optimised in T3, and neck length was longest in T2 and T4. Other morphometric traits (rump length, abdominal length, ear length, tail length, and horn length) showed variable responses, with most being predominantly influenced by genetics rather than short-term nutrition. Hot carcass weight (4.35 kg) and weights of key primal cuts (thigh, rump, neck, shank) and metabolically active organs (liver, heart, kidney) were significantly higher in T4 (P < 0.05), with no adverse effects on lungs or spleen. The 25% GG + 75% JFL silage mixture provided the best nutrient balance, supporting superior growth, selected morphometric development, and carcass yield. Results demonstrate that ensiled jackfruit leaves can serve as a high-protein browse resource to enhance silage quality and mitigate dry-season feed shortages in tropical goat production systems.

Keywords

Carcass traitsGrowth performanceGuinea grassJackfruit leavesLinear body measurementsSilageWest African Dwarf goats.

References

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Growth performance, carcass characteristics and meat yield of Boer goats fed diets containing leaves or whole parts of Andrographis paniculata. Asian-Australasian Journal of Animal Sciences, 27(4), 503–510. Table 1. Effect of guinea grass and jackfruit leaves silages on growth performance of WAD goats PARAMETERS T1 T2 T3 T4 T5 MEAN TFI (kg) 17.09± 0.39 17.97 ± 1.78 19.09±0.81 21.84±2.53 17.600±1.12 18.66 WFI (kg) 1.42±0.07 1.50±0.14 1.59±0.67 1.79±0.07 1.46±093 1.57 DFI (kg/day) 0.20±0.01 0.21±0.02 0.22±0.01 0.26±0.01 0.21±0.01 0.23 IBW (kg) 5.75±0.23 5.53±0.34 5.6±0.24 5.75±0.24 5.54±0.33 5.64 FBW (kg) 6.39±0.06b 6.83±0.34b 6.79±0.05b 8.03±0.28a 7.02±0.37ab 7.01 TBWG (kg) 0.63±0.17c 1.30±0.00bc 1.16±0.29bc 2.28±0.07a 1.50±0.00b 1.37 ADWG (g/day) 7.54±1.98c 15.48±0.00bc 13.77±3.44bc 27.18±0.86a 17.86±0.00b 16.36 FCR(g/day) 33.70±12.75 13.83±1.37 18.93±5.21 9.43±0.82 11.74±0.75 17.52 a,b,c, Means bearing different superscripts along the same row are significantly different. (P< 0.05); GG = Guinea grass; JFL = Jack Fruit Leaves; TFI= Total Feed Intake; WFI= Weekly Intake; DFI= Daily Feed Intake; IBW= Initial Body Weight; FBW= Final Body Weight; TBWG= Total Body Weight Gain; FCR= Feed Conversion Ratio and ADWG= Average Daily Weight Gain; T1- 100% GG; T2- 75% GG + 25% JFL; T3- 50% GG + 50% JFL; T4- 25% GG + 75% JFL and T5- 100% JFL. Table 2 Effect of guinea grass and Jackfruit leaves silages on body measurements of WAD goats PARAMETERS T1 T2 T3 T4 T5 MEAN IWH (m) 0.38±0.00a 0.35±0.00a 0.38±0.0ab 0.35±0.00b 0.37±0.01ab 0.37 FWH (m) 0.44±0.00a 0.40±0.00b 0.43±0.01ab 0.40±0.01b 0.43±0.0ab 0.42 IBL (m) 0.45±0.00c 0.40±0.00d 0.50±0.01b 0.53±0.01a 0.50±0.01b 0.50 FBL(m) 0.50±0.00b 0.45±0.00c 0.55±0.01a 0.58±0.001a 0.54±0.00a 0.52 IHL(m) 0.12±0.00c 0.13±0.01c 0.16±0.00a 0.14±0.00ab 0.14±0.00a 0.14 FHL (m) 0.12±0.00c 0.13±0.01bc 0.16±0.00a 0.14±0.00ab 0.14±0.00b 0.14 INL (m) 0.08±0.00 0.08±0.00 0.08±0.00 0.08±0.00 0.08±0.00 0.08 FNL (m) 0.100±0.00c 0.13±0.00a 0.11±0.01bc 0.13±0.01ab 0.12±0.00ab 0.12 IRL (m) 0.42±0.01a 0.40±0.00b 0.40±0.00b 0.35±0.00c 0.40±0.00b 0.40 FRL (m) 0.45±0.42a 0.42±0.00b 0.40±0.00b 0.38±0.00c 0.42±0.00b 0.42 IAL (m) 0.18±0.00b 0.15±0.00b 0.15±0.01b 0.17±0.01b 0.27±0.01a 0.19 FAL (m) 0.18±0.00b 0.15±0.00b 0.15±0.01b 0.18±0.01b 0.28±0.02a 0.19 IHG (m) 0.03±0.00b 0.30±0.00b 0.05±0.02b 0.13±0.00a 0.11±0.00a 0.07 FHG (m) 0.03±0.00b 0.03±0.00b 0.05±0.02b 0.12±0.00a 0.11±0.00a 0.07 IEL (m) 0.09±0.00a 0.04±0.00b 0.03±0.00bc 0.02±0.00c 0.04±0.01b 0.05 FEL (m) 0.09±0.00a 0.04±0.00b 0.03±0.00bc 0.03±0.00c 0.04±0.00b 0.05 ITL (m) 0.12±0.02 0.12±0.00 0.13±0.00 12±0.00 0.07±0.03 0.11 FTL (m) 0.14±0.01a 0.12±0.00a 0.13±0.00a 0.13±0.00a 0.12±0.00b 0.12 IHL (m) 0.01±0.00 0.01±0.00 0.02±0.00 0.01±0.00 0.02±0.00 0.02 FHL (m) 0.02±0.00 0.03±0.00 0.03±0.00 0.03±0.00 0.30±0.00 0.03 a,b,c, Means bearing different superscripts along the same row are significantly different (P< 0.05); GG = Guinea grass; JFL = Jack Fruit Leaves; IWL= Initial Wither Length; FWL= Final Wither Length; IBL= Initial Body Length; FBL= Final Body Length; IHL= Initial Head Length; FHL= Final Head Length; INL= Initial Neck Length; FNL= Final Neck Length; IRL= Initial Rump Length; FRL= Final Rump Length; IAL= Initial Abdominal Length; FAL= Final Abdominal Length; IHG= Initial Heart Girth; FHG= Final Heart Girth; IEL= Initial Ear Length; FEL= Final Ear Length; ITL= Initial Tail Length; FTL- final Tail Length; IHL= Initial Horn Length and FHL= Final Horn Length; T1- 100% GG; T2- 75% GG + 25% JFL; T3- 50% GG + 50% JFL; T4- 25% GG + 75% JFL and T5- 100% JFL. Table 3 Effect of guinea grass and jackfruit leaves silages on internal organs and some weights of cut parts of WAD goats Parameters T1 T2 T3 T4 T5 MEAN Carcass (kg) 3.40±0.06b 3.34±0.03b 3.35±0.03b 4.35±0.15a 3.14±0.03b 3.52 Head (kg) 0.60±0.01c 0.70±0.01a 0.62±0.02c 0.64±0.01ab 0.64±0.01bc 0.65 Neck (kg) 0.21±0.00bc 0.22±0.00abc 0.18±0.02c 0.26±0.01a 0.23±0.01ab 0.22 Rump (kg) 0.27±0.01b 0.29±0.01ab 0.27±0.01b 0.37±0.01a 0.30±0.01ab 0.30 Thigh (kg) 0.54±0.01b 0.54±0.01b 0.56±0.02b 0.78±0.07a 0.51±0.02b 0.59 Shank (kg) 0.23±0.00ab 0.24±0.00ab 0.23±0.00b 0.26±0.01a 0.21±0.00b 0.24 Liver (kg) 0.12±0.00b 0.12±0.01b 0.120.00b 0.16±0.02a 0.15±0.00ab 0.13 Heart (kg) 0.04±0.00b 0.04±0.00b 0.04±0.00ab 0.06±0.01a 0.04±0.00b 0.04 Lungs (kg) 0.14±0.001 0.12±0.01 0.13±0.00 0.13±0.00 0.11±0.01 0.13 Kidney (kg) 0.12±0.00b 0.12±0.00ab 0.14±0.01ab 0.14±0.01a 0.12±0.00b 0.13 Scrotum (kg) 0.11±0.01ab 0.10±0.00b 0.10±0.00b 0.14±0.02a 0.09±0.00b 0.11 Gall Bladder (kg) 0.01±0.00b 0.01±0.00c 0.01±0.00c 0.01±0.00a 0.01±0.00a 0.01 Bile Duct. (kg) 0.003±0.00 0.03±0.00 0.003±0.00 0.003±0.00 0.003±0.00 0.003 GIT with Contents. (kg) 1.63±0.01c 1.68±0.00c 2.16±0.01b 2.62±0.12a 2.23±0.04b 2.06 Spleen (kg) 0.02±0.00 0.2±0.00 0.02±0.00 0.03±0.00 0.02±0.00 0.02 a,b,c, Means bearing different superscripts along the same row are significantly different. (P< 0.05); GG = Guinea grass; JFL = Jack Fruit Leaves; T1- 100% GG; T2- 75% GG + 25% JFL; T3- 50% GG + 50% JFL; T4- 25% GG + 75% JFL and T5- 100% JFL.